Orbea Onna 20 29'' - Burning Red (Gloss) / Black (Matt) 2026

Orbea Onna 20 29" – The perfect partner for your first trails

Discovering MTB is above all a desire for escape and new sensations. From deep forests to rocky ridges, every ride becomes an adventure where confidence and enjoyment are built pedal stroke after pedal stroke. Gradually, your technique improves, comfort increases and the passion for the trails keeps growing.

The Orbea Onna 20 29" MTB has been designed to support you in this progression. Its balanced geometry provides stability and control to discover and master the tracks. With its 29-inch wheels matched to the frame, it offers smooth rollover and efficient performance, ideal for progressing confidently on all types of terrain.

On the equipment side, the Onna 20 features a tapered head tube compatible with 100 mm suspension forks, hydraulic disc brakes for precise stopping power and an intuitive Shimano 1x drivetrain. Its generous clearance allows for wider tyres for more comfort and grip, so every ride is a real pleasure.

Key features

• DROPPA POST COMPATIBLE: The Onna is compatible with 27.2 mm diameter dropper posts with internal routing, so don’t limit your future trail dreams
• TAPERED HEAD TUBE: A tapered head tube and fork steerer provide strength and stiffness where needed, while weight is reduced thanks to aluminium head tubes
• HYDRAULIC DISC BRAKES: 160 mm post-mount hydraulic disc brakes are fitted to every Onna
• THREADED BOTTOM BRACKET: Threaded bottom brackets require little maintenance and are easily replaced by budding mechanics
• QUICK RELEASE AXLES: The Onna is supplied as standard with quick release axles
• ICR INTEGRATION: The Internal Cable Routing follows the most efficient path behind the head tube, with no friction or noise
• HIGH-PERFORMANCE ALUMINIUM FRAME: The high-performance aluminium frame and shaped tubes of the Onna allow perfect control of its behaviour. Stiff enough to be fast and responsive, supple enough to remain comfortable and manageable. The Onna is ready to answer the call of the trails.
• LUGGAGE RACK MOUNTS: Forged dropouts allow secure fitting of a wide variety of racks
• KICKSTAND: The left chainstay has a dedicated mounting point for a kickstand
• LIFETIME WARRANTY: In addition to the legal warranty period, Orbea offers a lifetime warranty on your bike’s frame

Specifications

• FRAME: Orbea Onna Alloy, Dropout 9x135, BSA BB, Internal cable routing
• FORK: RockShox Judy Silver TK Crown adjust QR Solo Air 100
• CHAINSET: Forged alloy, 32t
• HEADSET: 1"-1/2 Semi-Integrated
• HANDLEBAR: Alloy, 31.8mm, Flat, 740mm, Sweep 9
• STEM: Alloy, 7º
• SHIFTERS: Shimano Cues SL-U6000
• BRAKES: Shimano MT200 Hydraulic Disc
• CASSETTE: Sun Race 11-50t 11-Speed
• REAR DERAILLEUR: Shimano Cues U6000 GS Shadow
• CHAIN: KMC eGlide
• WHEELS: Orbea WH 2.1, Alloy, 27.5", 32H
• TYRES: Kenda Booster 2.40" 30TPI
• SEATPOST: SP 0.6, Alloy, 27.2mm, Setback 0
• PEDALS: VP-537 Black
• SADDLE: Fortune QF-3091

Size info (indicative dimensions)

• S (29"): 155 to 170 cm (61.1"-66.9")
• M (29"): 165 to 180 cm (65.0"-70.9")
• L (29"): 175 to 190 cm (70.1"-74.8")
• XL (29"): 185 to 195 cm (72.8"-76.8")